doc/en/Makefile: stabilize output between regendoc versions
doc/en/Makefile: stabilize output between regendoc versions

tomviner/pytest,The-Compiler/pytest,nicoddemus/pytest,Akasurde/pytest,RonnyPfannschmidt/pytest,markshao/pytest,The-Compiler/pytest,tomviner/pytest,pytest-dev/pytest,nicoddemus/pytest,alfredodeza/pytest